Auxiliary electrode invasion device

Abstract

The utility model belongs to the technical field of medical equipment, and particularly relates to an auxiliary electrode invasion device. Aiming at the problem that in the prior art, a tiny electrode cannot puncture and detect deep tissues, the utility model provides an electrode auxiliary invasion device which comprises a sleeve, a puncture needle rod and an electrode detection assembly, the cannula is detachably connected with the puncture needle rod in a nested mode, and the electrode assembly is located in a cavity between the cannula and the puncture needle rod or penetrates into the puncture needle rod from the dismounting position after the puncture needle rod is dismounted; the part, close to the puncture needle rod head, of the sleeve is provided with a contact part with a through hole array, the electrode detection assembly comprises a detection end with a long and thin head and an electrode wire, and the electrode wire can be moved to enable the head of the detection end to penetrate through the through holes to reach the outside of the contact part. After the puncture needle rod is used for puncture open circuit, the contact part with the through hole is used for conducting electrode puncture detection on tissue, the contact part can resist extrusion pressure of the detected tissue, and the problem that a tiny electrode tip cannot detect deep / internal tissue is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to an electrode-assisted invasive device. Background Art

[0002] In clinical practice, electrodes are often used to measure oxygen partial pressure in human tissue to infer tissue recovery capacity. For example, the two different treatment options for the inferior mesenteric artery (IMA) during rectal cancer surgery—high tie HT (not preserving the left colic artery) and low tie LT (preserving the LCA)—are determined based on measuring the oxygen partial pressure (PO2) in the colon wall tissue. Currently, a mature oxygen partial pressure measuring instrument, the POG-203, utilizes a polarographic dissolved oxygen electrode (Clark electrode) to measure the absolute oxygen partial pressure (mmHg). This instrument can quickly and intuitively reflect tissue oxygenation status and, in essence, reveal the impact of preserving the LCA on the blood flow of the proximal sigmoid colon. However, the Clark electrode, which serves as the detection tip, is a crystal glass tube with a diameter of approximately 0.05 cm. This is very fragile and cannot be used to directly puncture deep tissue. Even if a path is created using surgical instruments, it is easily bent by tissue pressure.

[0003] For example, a Chinese utility model patent discloses a drainage device with an oxygen partial pressure detection function [application number: 202120641717.X]. The utility model includes a sterile cotton layer, an attached film, and a drainage tube. The bottom surface of the attached film is bonded with a sterile cotton layer by glue, and transcutaneous oxygen partial pressure electrodes are embedded at both ends of the bottom of the sterile cotton layer through mounting grooves. The center of the attached film and the sterile cotton layer is penetrated by a mounting hole, and a perforated rubber block and a rubber wire conduit sleeve are installed on the top of the mounting hole through a positioning plate. This new drainage device is simple to operate, easy to detect oxygen partial pressure, meets various needs in use, and is suitable for widespread promotion and use.

[0004] Although the utility model has transcutaneous oxygen partial pressure electrodes embedded in the installation grooves at both ends of the bottom of the sterilized cotton layer, the device mainly detects the wound and cannot measure deep tissues that need to be punctured, and the detection position is greatly limited. Summary of the Invention

[0005] The purpose of the present invention is to solve the above-mentioned problems and provide an electrode-assisted invasive device to achieve stable detection of deep tissues by a small electrode head with weak puncture ability.

[0006] The utility model includes a sleeve, a puncture needle rod, and an electrode detection assembly; the sleeve and the puncture needle rod are detachably nested and connected, and the electrode assembly is located in the cavity between the sleeve and the puncture needle rod or is inserted into the disassembly position after the puncture needle rod is disassembled; the sleeve is provided with a contact portion with an array of through holes near the puncture needle rod head, and the electrode detection assembly includes a slender detection end and an electrode wire, and the movement of the electrode wire can make the detection end head move from the through hole in the sleeve to the outside of the contact portion.

[0007] Preferably, the detection end is a patch-type electrode, which can prevent blood and water from overflowing to a certain extent, and the detection end head is the electrode port.

[0008] Preferably, for easy manipulation, the electrode wire is hard, and the detection end head is moved in and out of the through hole by moving the electrode wire perpendicular to the outer wall of the casing. As a conceivable method, a method such as designing the electrode wire to be connected to the contact portion in a vertical bend can be adopted.

[0009] Preferably, the tail of the puncture needle rod is provided with a screw cap, the tail of the sleeve is hollow, the screw cap and the tail of the sleeve are detachably connected by a thread, if the electrode wire is not built in in advance, the screw cap can be unscrewed and the puncture needle rod can be pulled out, and the electrode wire can be inserted from the tail of the sleeve.

[0010] As an alternative, the tail of the puncture needle rod is connected to the cannula through elastic nesting, the tail of the cannula is hollow, and the electrode wire of the puncture needle rod can be inserted into the tail of the cannula after the puncture needle rod is pulled out.

[0011] Preferably, the cavity is provided with a hard wire channel, the electrode wire is inserted into the wire channel, and the detection end head is connected to the electrode wire on the side of the wire channel close to the puncture needle rod needle head. The wire channel moves along the inner wall of the vertical sleeve to enable the detection end head to enter and exit the through hole.

[0012] Preferably, for easy manipulation, the wire channel is connected to a traction bar / handle, and the traction bar / handle drives the wire channel to move vertically along the inner wall of the sleeve.

[0013] Preferably, for easy holding, a handle perpendicular to the outer wall of the sleeve is provided downwardly on the side of the sleeve away from the puncture needle rod head.

[0014] In order to be more tissue-friendly, preferably, the periphery of the contact portion is elastic.

[0015] Preferably, the contact portion is an independent component that can be detachably mounted on the sleeve so as to be adjusted to different calibers and through-hole sizes as required.

[0016] Compared with the existing technology, the advantages of this utility model are:

[0017] 1. After the puncture needle rod is used to puncture and open the circuit, the utility model uses the contact part with a through hole to perform electrode puncture detection. The contact part can resist the squeezing pressure of the tissue being detected, solving the problem that the fine electrode head cannot detect deep / internal tissues.

[0018] 2. The present invention provides a solution of setting a hard wire conduit in the casing, which solves the problem of difficulty in controlling the displacement of the soft electrode wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the composition of the utility model;

[0020] Figure 2 This is a schematic diagram of another embodiment of the present utility model;

[0021] Figure 3 for Figure 2 Exploded view;

[0022] In the figure: cannula 1, puncture needle rod 2, electrode detection assembly 3, contact part 4, screw cap 5, wire channel 6, traction bar / handle 7, detection end 31, electrode wire 32, through hole 41. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Example 1: The present invention is an electrode-assisted invasive device, such as Figure 1 As shown, it includes a sleeve 1, a puncture needle rod 2, and an electrode detection assembly 3; the sleeve 1 and the puncture needle rod 2 are detachably nested and connected, and the electrode detection assembly 3 is located in the cavity between the sleeve 3 and the puncture needle rod 2 or is inserted into the disassembly position after the puncture needle rod 2 is disassembled; the sleeve 1 is provided with a contact portion 4 with an array of through holes 41 near the head of the puncture needle rod 2, and the electrode detection assembly 3 includes a slender detection end 31 and an electrode wire 32. Moving the electrode wire 32 can make the head of the detection end 31 move from the through hole 41 to the outside of the contact portion 4.

[0025] When the present invention is used, puncture is performed using the head of the puncture needle rod 2. After reaching the designated position, if the electrode detection component 3 is pre-placed in the sleeve 1, the electrode wire 32 is moved so that the head of the detection end 31, that is, the electrode head, passes through the through hole 41 to the outside of the contact portion 4 to penetrate the tissue for detection; if it is not pre-placed, the puncture needle rod 2 is disassembled and pulled out first, and the electrode wire 32 with the detection end 31 is inserted, and then the electrode wire 32 is manipulated to make the head of the detection end 31 pass from the through hole 41 to the outside of the contact portion 4.

[0026] Preferably, Figure 1As shown, the detection end 31 is a patch-type electrode, and the patch-type base is arranged near the head of the detection end 31 to alleviate blood and water overflow when the head of the detection end 31 is inserted into the tissue.

[0027] It is easy to imagine that in order to facilitate the control of the electrode wire 32 to drive the detection end 31, it is preferred to set the outer shell of the electrode wire 32 to be hard, which is vertically connected to the detection end 31. In this way, moving the electrode wire 32 perpendicular to the inner wall of the sleeve 1 can make the head of the detection end 31 enter and exit the through hole 41.

[0028] As a detachable connection method that is easy to think of, the tail of the puncture needle rod 2 is provided with a screw cap 5, the tail of the sleeve 1 is hollow, the screw cap 5 and the tail of the sleeve 1 are detachably connected by a thread, and the screw cap 5 is unscrewed and the puncture needle rod 2 is pulled out, and the electrode wire 32 can be inserted from the tail of the sleeve 1.

[0029] For easy holding, a handle perpendicular to the outer wall of the cannula 1 is provided downward on the side of the cannula 1 away from the head of the puncture needle rod 2 .

[0030] In order to be more friendly to the surrounding tissues, the outer periphery of the contact portion 4 is elastic.

[0031] In order to facilitate the change of the size and arrangement specifications of the through-holes of the contact portion 4 , the contact portion 4 can be provided as an independent component and can be detachably mounted on the sleeve 1 .

[0032] The working principle of this embodiment is as follows: the head of the puncture needle rod 2 is used to puncture to reach the desired position, and the contact portion 4 expands the tissue to be tested to support the detection space of the detection end 3 to protect the fragile detection head. If the electrode detection assembly 3 is pre-installed in the sleeve 1, the electrode wire 32 is moved to cause the head of the detection end 31, i.e., the detection electrode head, to penetrate the tissue from the through-hole 41 to the outside of the contact portion 4 for testing. If it is not pre-installed, the puncture needle rod 2 is first removed and the electrode wire 32 with the detection end 31 is inserted. After the electrode wire 32 is manipulated to move in a direction perpendicular to the inner wall of the sleeve 1, the head of the detection end 31 is moved from the through-hole 41 to the outside of the contact portion 4 to penetrate the tissue to be tested, thereby completing the test.

[0033] Example 2: The same parts as the example are not described again. Compared with example 1, the improvement is that a hard wire channel 6 is separately provided in this example, so the electrode wire 32 of this example can be soft, and the wire channel 6 is vertically connected to the detection end 31. In this way, the electrode wire 32 can be moved in the direction of the outer wall of the vertical sleeve 1 to allow the head of the detection end 31 to enter and exit the through hole 41.

[0034] Furthermore, for ease of operation, Figure 2The wire channel 6 is shown connected to a pull bar / handle 7, which drives the wire channel 6 to move perpendicular to the outer wall of the casing 1. As an easily conceivable method, a hole can be opened in the casing 1 to facilitate the operation of the pull bar / handle 7. By pulling the pull bar / handle 7, the wire channel 6 moves perpendicular to the outer wall of the casing 1, so that the head of the detection end 31 enters and exits the through hole 41.

[0035] Example 3: The difference between this example and the example is that the cannula 1 and the puncture needle rod 2 are detachably connected in an elastic nesting manner, which improves the disassembly efficiency. If the electrode detection component 3 is not pre-built in, after the puncture needle rod 2 is removed, the electrode detection component 3 is inserted from the rear end of the cannula 1.

[0036] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0037] Although this document frequently uses terms such as cannula 1, puncture needle shaft 2, electrode detection assembly 3, contact portion 4, screw cap 5, wire channel 6, traction bar / handle 7, detection end 31, electrode wire 32, and through-hole 41, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. An electrode-assisted invasive device, comprising a cannula (1), a puncture needle rod (2), and an electrode detection assembly (3); the cannula (1) and the puncture needle rod (2) are detachably nested and connected, and the electrode detection assembly (3) is located in a cavity between the cannula (1) and the puncture needle rod (2) or is inserted from the disassembly position after the puncture needle rod (2) is disassembled; and is characterized in that: The sleeve (1) is provided with a contact portion (4) having an array of through holes (41) near the head of the puncture needle rod (2). The electrode detection assembly (3) comprises a detection end (31) with an elongated head and an electrode wire (32). The movement of the electrode wire (32) enables the head of the detection end (31) to move from the inside of the sleeve (1) through the through hole (41) to the outside of the contact portion (4).

2. The electrode-assisted invasive device according to claim 1, wherein: The detection end (31) is a patch-type electrode.

3. The electrode-assisted invasive device according to claim 1, wherein: The electrode wire (32) is hard, and the electrode wire (32) is moved in a direction perpendicular to the outer wall of the sleeve (1) so that the head of the detection end (31) enters and exits the through hole (41).

4. The electrode-assisted invasive device according to claim 1, wherein: The tail of the puncture needle rod (2) is provided with a screw cap (5), the tail of the sleeve (1) is hollow, and the screw cap (5) and the tail of the sleeve (1) are detachably connected via a thread.

5. The electrode-assisted invasive device according to claim 1, wherein: The tail of the puncture needle rod (2) is elastically nested and connected to the sleeve (1), and the tail of the sleeve (1) is hollow.

6. The electrode-assisted invasive device according to claim 1, wherein: A hard wire channel (6) is provided in the cavity between the sleeve (1) and the puncture needle rod (2), and the electrode wire (32) is inserted into the wire channel (6). The head of the detection end (31) is connected to the electrode wire (32) at the side of the wire channel close to the needle head of the puncture needle rod (2). The wire channel (6) moves vertically along the outer wall of the sleeve (1) to enable the head of the detection end (31) to enter and exit the through hole.

7. The electrode-assisted invasive device according to claim 6, wherein: The wire channel (6) is connected to a traction bar / handle (7), and the traction bar / handle (7) drives the wire channel (6) to move vertically along the outer wall of the sleeve (1).

8. The electrode-assisted invasive device according to claim 1, wherein: A handle perpendicular to the outer wall of the sleeve (1) is provided downwardly on the side of the sleeve (1) away from the head of the puncture needle rod (2).

9. The electrode-assisted invasive device according to claim 1, wherein: The periphery of the contact portion (4) is elastic.

10. The electrode-assisted invasive device according to claim 1, wherein: The contact portion (4) is an independent component and can be detachably mounted on the sleeve (1).

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